Terminal clip machine



A 26, 1941- c. J. KELLER 2,254,117

TERMINAL CLIP MACHINE Filed July 25, 1940 6 Sheets-Sheet 1 INVENTOR roi/ ' ATTORNEY/4 Aug, 26, 1941. c. J. KELLER TERMINAL CLIP MACHINE Filed Ju1y.25, 1940' 6 Sheets-Sheet 2 Aug. 26, 1941. c. J. KELLER Filed July 25, 1940 v TERMINAL CLIP MACHINE 6 Sheets-Sheet 3 BY WW W5 26, 1941- c. J. KELLER 2254,11? TERMI NAL CLIP MACHINE Filed July 25, 1940 f 6 Sheets-Sheet 4 Z w l EgTOR I Map 6 Sheets-Sheet 5 C. J. KELLER TERMINAL CLIP MACHINE Filed July 25, 1940 Aug. 26, 1941.

Jay-4Q) g 26, c. J. KELLER 2,254,117

TERMINAL CLIP MAOI-IfNE Filed July 25, 1940 e Sheets-Sheet e INVENTOR 16M am Arronw i reared Aug. as, 1941 FFICE TERMINAL our Clarence J. Keller, Anderson, ind assignor to General Motors Corporation, Detroit, Micln, a I corporation of Delaware Application July 25, 1949, Serial No. 347,513 .6 Claims. (01. 153-1) This invention relates to the manufacture of terminal members for electrical conductors.

An object of the present invention is to provide a machine for punching a blank from sheet material, forming the blank into an angular terminal member having a tubular socket to receive a plug and a tubular socket for attaching the terminal member toa cable.

Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accompanying drawings wherein a preferred embodiment of the present invention is clearly shown.

In the drawings:

Fig. 1 is a fragmentary perspective view of the machine embodying the present invention.

Fig. 2 is a progressive view, in perspective, of a stripas it appears before a blank is severed from the strip of sheet metal.

Fig. 3 is a plan view, in perspective, after the 1 blank is severed from the strip;

Fig. 4 is a perspective view of the blank bent into shape prior to attaching it to a cable. Figs. 5 and 6 are perspective views of an angular terminal member formed from the blank and attached to the cable.

Fig. '7 is a. plan view of the lower parts of the apparatus attached to the bed of a punch press.

Fig. 8 is an underside view of the parts of the apparatus attached to the head of the punch press.

Fig. 9 is a horizontal sectional view of the die members supported within a base frame. (For sake of cleamess, certain parts are in plan view.)

Fig. 10 is a sectional view on the lines Ill-l9 of Fig. 7, Fig. 8 and Fig. 9, showing the punches and dies for performing the first operation.

Fig. 11 is a sectional view on lines Ii-ll of [Figs '7', 8 and 9, showing the punches and dies for performing the second operation.

Fig. 12 is a sectional view on lines l2--l2 of Figs. 7, 8, and 9, showing a blank locating rod between the punches and dies for performing the second and third operations.

Fig. '13 is asectional view on the lines l3--l9 of Figs. '7, 8 and 9, showing the punches and dies for performing the third operation.

Fig. 14 is a sectional view on the lines ll-ll of Figs. 7, 8 and 9, showing the punches and dies for performing the 4th operation.

Fig. 15 is a sectional view on the lines l5-l5 of Figs. '7, 8 and 9, showing the punches and dies the 5th operation the blank is sheared by a shearing punch and die shown in section mm. 17)

Fig. 16 is a view taken in the direction of the arrow I9 in Fig. 15.

Fi 1'7 is a sectional view on th of Figs. 7, 8 and 9.

Fig. 18 is a sectional view on lines l8-l8 'of Figs. 7, 8 and 9.

Fig. 19 is a plan view of a base block for supporting a base frame and the dies.

Fig. 20 is an end view of the base block.

Fig. 21 is a side view of the base block.

Fig. 22 is a plan view of a block attached to the press head adapted to receive the shanks of a plurality of punches.

Fig. 23 is an end view looking in the of arrow 29 in Fig. 22.

Fig. 24 is a plan view of a block for supporting the punches.

Fig. 25 is an end view of the block looking in the direction of the arrow 24 of Fig. 24.

Fig. 26 is a plan view drawnto a larger scale than Figs. 9 and 15, showing an assembly of lines 11-" direction three die blocks used in performing the 6th and 7th operation.

Fig. 27 is a side view thereof.

Fig. 28 is an end view thereof.

Figs. 29, 30 and 31 are fragmentary sectional views on the lines 29-29, 39-30 and 3l-3l, of Fig. 27.

Fig. 32 is a fragmentary front elevation of the punch 226.

Fig. 33 is a side elevation.

Fig. 34 is a view in the direction of the arrow 34 of Fig. 33.

Fig. 35 is a fragmentary rear elevation of punch 229. a

Fig. 36 is a side view thereof.

Fig. 37 is a view in the direction of arrow 91 in Fig. 36.

Fig. 38 is a side elevation of block I69 as viewed from the bottom of Fig. 9.

Fig. 39 is a side elevation of block i 59 as viewed from the bottom of Fig. 9.

Referring to the drawings, a punch press 39 comprises a bed 2i having side frames 32 and 33 providing bearings 34 and 35 for a shaft 39 having a crank 91 connected by an eccentric link 39 with a reciprocable press head 39. The shaft 99 carries a crank disc 09 carrying an adjustable pin ll connected to one end of an adjustable linkage 42. The other end of the linkage 42 is provided with a yoke 43 which is connected to for performing the 6th and 7th operations (in one end of a link 44 by a pin A5. The link 44 has a. yoke 440. connected by pin 46 with one arm 41 of a bell crank lever 48 pivotally mounted at 49 upon spaced brackets 60. The brackets 50 are supported on a frame 6| supported on the bed 3| of the press. The other arm 02 of the bell crank lever 48 is operatively connected with the slidable member 53 of a feed mechanism 65, said member 53 being slidably supported by the frame 6| between the brackets 60. The feed mechanism 56 is provided with adjustable guide rollers 56 between which a strip of sheet; metal 60 is moved intermittently.

When the shaft 26 is rotated the feed mechanism 65 will be reciprocated to feed the strip of sheet metal 60 step-by-step through a shallow groove 6| provided on the lower side of a cover plate 62. The plate 621s attached by suitable screws 63 to a base frame 64. The base frame 64 is secured by screws to the base block 66 in any suitable manner not shown.

The supply strip 60 is progressively fed by the feeding mechanism 56 over the top surface of the base frame 64 to the right as viewed in Fig. 1 and downwardly as viewed in Fig. '7; and is operated upon as shown in Fig. 2. Then a blank 10 (Fig. 3) severed from the strip is formed into an L-shaped member of U-cross section (Fig. 4). Then the L-shaped member'is moved at right angles to the left where the U-shaped arms of the L-shaped member are formed into tubular shape (Fig. 5) with one arm being attached to a cable 1|, and the other providing a socket to be attached to a terminal post.

The feed mechanism 66 is standard form of strip metal feeding apparatus and is not per se a part of the present invention. The feed illustrated is known to the trade as the U. S. Tool Co. slide feed.

The strip 60 is fed lengthwise past a series of punches and dies by an intermittent vmotion in steps, the distance of which is equal to the width of the blank (Fig. 3). The first operation performed by the punches and dies is in Fig. 10. In this operation the strip 60 is operated upon by a pair of punches 12 and 13 attached to a block 14 by set screws 14a. The block 14 is attached to a block 15 which is secured to the press head 39. The block 15 is provided with tapped holes in alignment with the punches 12 and 13 to receive set screws 16 which may be screwed down against the punches. The punch 12 is provided at its lower end with an elongated recess 11 while the lower end of punch 13 is flat. Upon downward movement of punches 12 and 13 they will pass through suitable holes 12a and 13a in the cover plate 62 and cooperate with stationary rods 18 and 19 firmly secured in a block 80 by set screws BI and 02 respectively. The block 80 is locked by screws 80a within an aperture 43 provided in the base frame 64. The upper end'oi' the rod 18 has an elongated projector 04 of smaller dimension than the recess 11. The projection 84 is adapted to force a portion of the metal upwardly, into the recess 11 to form a detent or boss 85 in the metal strip 60 (Fig. 2). The upper end of the rod 19 is provided with raised letters (not shown) by which identification marks are impressed into the strip 60.

The second operation is shown in Fig. 11. There is no movement of the strip 60 between the first and second operations. The strip 60 is operated upon by a punch 90 having a shank 0| extending through the block ;14 and into a recess 92 in the block 15. A tapped hole, provided in the block 15 is located above the recess 92 for receiving a set screw 93 which is screwed down against the shank III to limit the upward movement of the punch 90. The lower portion 94 of the punch is in the form of an irregular hexagon. The punch portion 94 passes through an opening 041: in the cover plate 62. The portion 94 of the punch 90 cooperates with die blocks and 84, each block having a groove which when assembled side by side and locked within the aperture 82 form an opening 94b which corresponds to the contour of the punch portion 94. The pieces cut out from. the strip 60 to provide the openings 96 are forced through between the grooves of the'die blocks and into an aperture 83a in the block 68 in alignment with an opening (not shown) in bed 3|.

Fig. 11 shows means for locating or centering the strip 60 while the diflerent punches carried by the press head operate upon the strip. Thisiocking means for the strip comprises a 'rod I00 having a shank ml and a hexagonal portion I02 adapted to enter hole I020. in cover 62. The shank is secured to the block 14 by a set screw I03. The shank extends into a recess of the block 16 and is limited in its upward movement by a set screw I04 carried by the block 16. It will be observed that the hexagonal portion I02 is substantially longer than the lower end 94 of the punch 00, thus the lower end of the rod I00 will enter the previously formed aperture 96 in strip 60 to lock the strip in position against further movement before the other punches can operate upon'the strip 60. Rod portion I02 passes through an opening I02b between blocks 84 and I I0 (Fig. 9).

The third operation is performed by the punch and die members shown in Fig. 13. In this operation the right edge portion (Fig. 2) of strip 60 is cut-away along the lines I050. by a punch I05 having a shank I06 and cutting portion I01. The shank I06 is secured to the block 14 by a set screw I08. The shank I06 extends into a recess in the block 15 and is limited in its upward movement thereon by a set screw I09. The

. cutting Portion I01 upon downward movement of the press head 39 is adapted to pass through an opening mm in the cover plate 62 said opening corresponding to the contour of the cutting portion I01. The portion I01 cooperates with a die IIO to shear the edge portion of the strip 60. The pieces which are cut off gravitate through the opening III. The opening III is located between the die block H0 and a plate II2 retained in notches provided by die block 84 and a die block H3. The plate I I3 guides the plane side of punch I01. The opening III is located above an opening II 4 in the base block 66. The bed 3| is also provided with an opening (not shown) through which the cut-01f portions gravitate into a suitable container.

The fourth step is that of piercing the strip 60 to form the tang I28 (Fig. 2). Referring to Fig. 14, the piercing apparatus comprises the die block III and a die block I20. The die blocks H3 and I20 are provided with semi-cylindrical portions I2I and I22 having shoulder portions I22 and I24 respectively. The shoulder I23 01 die block H3 is provided with a V-shaped groove or notch I25 and the shoulder I 24 closes the notch to form an opening of triangular shape. Guided between the semi-cylindrical portions I2I and I22 is a plunger I26 which carries a V-shaped piercing member I21 which is adapted to extend into and slide in the V-shaped notch I26. The purpose of the member I 21 is to pierce the strip 88 to form the pointed tang I28 (Figs. 2 and 14).- The lower end of the plunger I28 is connected with a rod I30 which passes loosely through a washer I8I bearing against the bottom of the bed 8I. The plunger I28 and the rod are 5 normally held in a non-operating position by a to receive a toe I38 of a lever I31 pivotally sup- 10 ed engagement with the block 88. Normally the ported at I88 on the bed 88. when the press head 38 descends; the plunger I28 is moved upwardly due to the engagement of a rod I88 carried by the block 14 with the lever I31. When this occurs the punch I21 pierces the strip 80 and 15 forms the tang I28 around a forming device I40.

A forming device I40 comprising blocks I and I42 and secured together by screws I 48 is attached to the block 14 by set screw I44. The

blocks Ill and I42 are of rectangular shape and each block is provided at its upper end with a flange I48 adapted to fit within a recess provided in the blocks 14 and 18. The forming device I40 is limited in its upward movement by set screw I48. The block MI is provided with a V-shaped groove I41 which cooperates with a groove I48 of the block I43 to receive the piercing punch I21 and the tang I28 of the strip 80. The piercing punch I21 cooperates with the forming device I40 -to punch out and to bend the tang I28 at sub 30 stantially right angles to the plane of the strip 80 and into the groove I48 of block I42.- Forming device I passes through hole I48 in plate 82 when the press head 38 descends.

Rod I38 is provided-with a threaded portion 35 I381: passing through a plain hole in a bracket I38b attached by screws I880 to the block 18. A cross pin I38d received by a groove in rod I38 prevents the turning of this rod while securing it to bracket I38b in the desired position of vertical fed against a stop I '(Fig. 17) which is in the aperture I82 of the frame 84 (Fig. 1'1) upon the upward movement of the press head. when the head 38 is moved downwardly the foremost portion of the strip 80 is severed from the remainder of the strip by a punch I8I secured to the blocks 50 I4 and 15 in the manner of securing the punching members previously described. The punch I5I cooperates with black I60 to sever the blank I 10 from the strip at a point that is substantially in the center of the hexagonal opening 85. The

pieces cut out by the punch I8I are forced through an opening I58 between blocks I80 and I8I which look in the opening I 82 provided by the base frame 84. These pieces pass through an opening I83 in block 88 and then drop into a 60 container provided for same. The blank 10 comprises an intermediate portion I55 having the detent 85 adjacent the edges I05a which were severed by the punch I05 and the tang I28 adjacent the opposite straight edge (Fig. 3). The 6 detent 88 and the tang I28 in this instance are in transverse alignment with each other. Since the blank is severed from the strip in the middle of the opening 88 the intermediate portion I58 is provided at each corner with a wing I58. I

After the blank 10 is severedfrom the strip the blank will rest upon the top surfaces of die blocks 0 and E101; locked in the opening I83.

The die blocks I10 and I10a together provide a V-shaped notch in and a hole in stem bottom of the notch.

A plunger I18, having reduced portions I18 and I11, is slidably supported within an opening in the block 88. The reduced portion I18 has a sliding fit with the opening I12 and is urged upwardly by a spring I18 around the portion I11 and havin: one end bearing against the shoulder formed thereby and the other end resting against a bottom wall of a tubular housing I18 having threadplunger I18 rests against the bottom suriace of the die member I10 and I10o so that the top end of the reduced portion I18 is flush with the top surface I10: and "011:, respectively, of the die members I10 and I10a.

In Figs. 26, 27 and 28 which show an assemscrew I83 and located by a screw I84 in block 18.

The channel I-I80o and the notch Ill are of such width as to accommodate the punch I8I and two thicknesses of the metal-blank. The lower end of punch I8I conforms to the notch I". The notch III is rounded and likewise the lower end of the punch I8I (Fig. 17). The lower end of the punch I8I is provided with a recess I to receive tang I28 and a recess I88 to receive the detent I88 when the blank is formed into angular shape 10a. As the blank 10 is thus formed. the wings I58 are formed into V-shaped channels by the cooperation of the side surfaces of the punch I8I with the side walls of the channel I80I80a. The plunger I18. moves .down with the work piece; and, when the punch I8I moves up, the plunger I18 moves up under-the action of spring I18 so that the work piece 10a will be lifted up so that its lowest portion is at the level of the bottom of channel I88-I80a. The work piece 10a is ready to be transferred to the dies which perform the 7th and last operation. The means for transferring the work piece will now be described with reference to Figs. 15 and i6.

During the upward movement of the press head 38 a cam plate I88, welded to a bracket I80a attaohed to the head, moves with it. The plate is provided with an inclined slot I8I to receive a roller I82 journaled on screw I82a carried by a slide I83. The slide I83 is slidably supported in guide members I84 and I88 which are held together by bolts I88. The guide I88 is secured to the plate 88 by screws I81 and I 88 and to the bed 3| by a stud I88 screwed into bed 8| and cooperating with nuts 200 between which there is clamped the bifurcated lug 20I of guide I85. A

5' transfer bar 202 is attached to. the slide I83 by rivets 203.' The inner end of the bar 202 is provided with a V-shaped notch 204 which is adapted to engage one arm 1011:: (Fig. 4) of the work piece 10a and move same at right angles to the direction of travel of the strip 80 to place the work piece in position so as to complete the bending of the wings I88 of eacharm into tubu-. lar shape.

In the 7th and final operation the left hand set of wings I58 (Fig. enclosing the tang I28, is to be bent around an insulated cable H as shown at b thereby forcing the tang I28 through the insulation of the cable into electrical contact with the conducting wire of the cable. The right hand set of wings I58 enclosing detent 85 is bent around to form a tubular socket for receiving a terminal plug or binding post, with which the detent 85 cooperates to maintain the terminal member 10!; upon the binding post.

Referring to Figs. 26 and 27, the die I10a has an extension 2I0 having an inclined semi-cylindrical groove 2 slightly less than the width of the channel I80a. A T-shaped die member 212 has its shank 2I8 (slightly wider than extension 2I0) also provided with an inclined semicylindrical groove 2I4. The ends of parts 2I0 and 2I3 abut at 2I5. The space between plate I50 and parts 2I0 and 2| 3 receives a plunger 2I6 having a flange 2I1 for normally abutting the underside of plate I50. The space between plate I60 and parts 2I0 and 2I8 receives a plunger 2I8 having a flange 2I8 which normally abuts the underside of block I60. Plungers 2I5 and 2I8 are urged upwardly by springs 220 confined in tubes 22I and surrounding the stems 222 of plungers 223 which engage these plungers.

Grooves 2H and 2I4 respectively receive the lower ends of forming punches 225 and 226 having at their lower ends, semi-cylindrical, inclined grooves 221 and 228 respectively. Slide 204 transfers the work piece 1011 into alignment with parts M0 and 2I3 and the piece 10a gravitates into grooves 2H and 2. The wire H is placed within the V-channel of the left arm of the work piece 10a. Then the punches 225 and 226 descend, and their grooved lower ends engage the pair of wings I58 to form them as shown at 10b (Fig. 5). The tang I28 is caused to pierce the cable insulation and engage the wire thereof. During the descent of the punches 225 and 226 and the work piece the pungers 2I6 and 2I8 descend to further compress the springs 220.

When the punches 225 and 226 ascend, the

plungers 2I6 and 2I8 ascend to eject the work.

The upper ends of punches 225 and 226 are received by a recess 221 in'plate 14 and are secured by screws 228 and 229 and are located by screws 230 in plate 15.

To assure that the work piece in the form 10a remains within the grooves 2II, 2I5 and under the punches 225, 226, accidental dislodgment of the piece 10a is prevented by a finger 230 normally having the position 2301: (Fig. 18) in dotdash lines. The piece 10a moves under this finger while being transferred from notch I1I to the notch between blocks 2I0 and 2I3. Finger 230 is pivotted at 23I upon a bracket 232 attached to frame 64 and is urged by spring 233 toward a stop pin 234. When punches 225 and 226 descend, the finger 230 is cammed toward the right in Fig. 18.

Referring to Figs. 19, 20 and 21, showing the base plate 66, the tapped holes 240 receive the screws I, (Fig. 10) which clamp the block 80 against the cover 62. Hole I02a is provided to receive punch I02 (Fig. 12). Hole I26a receives the plunger I26'and notch I31d provides clearance for the lever I31 (Fig. 14'). Numeral 24I indicates a counterbored and tapped hole for receiving tube 218 (Fig. 15). Recess 242 receives plunger 2I8; and recess 243 receives plunger 2i6 (Fig. 18). Numeral 243 indicates two tapped holes for receiving two tubes 22I (Fig. 18). Within holes 244, and 245, there are press fitted the pilot pins 246 and 241 (Fig. 1 shows pin 246) Numeral 248 (Fig. 20) indicates the notch for receiving the frame 64 (Fig. 9). Numeral 248 (Fig. 19) refers to tapped holes for receiving the screws I310 (Fig. '1). Numeral 250 refers to tapped holes for receiving screws 25I (Fig. 11) which clamp the block 84 against the cover 62. Numeral 252 refers to tapped holes for receiving screws 253 (Fig. 13) which clamp the block IIO against the cover 62. Tapped hole 254 receives screw I88 (Fig. 15). Tapped hole 255 receives screw I91 (Fig. 15).

Referring to Fig. 9, the frame 64 is attached to the base plate 66 by screws 260. 26I, 262, 268, 264, 265, 266 received by holes 260a, 26Ia, 262a, 263a, 264a, 265a, 266a (Fig. 19) provided respectively by base 66.

Referring to Figs. 24 and 25, plate 14 provides holes 210 and 2' respectively for receiving the punches 12 and 13 (Fig. 10), and with tapped holes 212 for receiving the screws 14a (Fig. 10). Plate 14 provides hole 213 for receiving the punch shank 800. (Fig. 11) and a tapped hole 214 for receiving screw 8|. Plate 14 provides a hole 218 for receiving the shank I M of punch I00 (Fig. 12) and with a tapped hole 216 for receiving the screw I03. Numeral 211 indicates a hole for receiving a shank of punch I05, and 218 the tapped hole for receiving the screw I08 (Fig. 13). Numeral 280 indicates the square hole for receiving the composite punch I40 (Fig. 14) and 280 indicates the tapped hole for receiving the screws I44. Numeral 282 indicates the square hole for receiving the shearing punch I1I (Fig. 17), and 283 indicates a tapped hole for receiving a screw, not shown, which clamps the punch I1I in the plate 14. Numeral 284 indicates a hole for receiving the shank of rod I82 (Fig. 17); and 285 indicates the tapped hole for receiving the screws I88. Numeral 286 indicates the square hole for receiving punches 225 and 226 (Figs. 8 and 15); and 261 indicates the tapped holes for receiving the screws 228; 268 indicates a notch for clearing pilot pin bushing 246a.

Referring to Figs. 22 and 23, within holes 286 and 281 in plate 15 there are mounted the pilot pin bushing 246a and 241a which respectively receive the pilot pins 246 and 241. Numeral 280 indicates the tapped holes for receiving screws 18 (Fig. 10). 29I is the tapped hole for receiving the screw 88 (Fig. 11) 292 is the tapped. hole for receiving the screw I04, (Fig. 12). 283 is the tapped hole for receiving the screw I08, (Fig. 13). The recess I45a, receives the flanges I45 of the parts I42 and HI (Fig. 14). Tapped holes 284 receive the screws I46 (Fig. 14). A recess receives the upper end of punch I5I (Fig. 17). Tapped holes 285 receive the screws I5Ib, (Fig. 17). Tapped hole 288 receives the screw I84 (Fig. 15). Tapped holes 289 receive screws 230 (Fig. 15). Holes 300, I, 802, and 303, of plate 14 (Fig. 24) align with holes 8I0, 3II, 8I2 and 3I3 of plate 15 (Fig. 22) for receiving screws which secure paltes 14 and 15 together.

While the embodiment of the present invention as herein disclosed, constitutes a preferred form, it is to be understood that other forms might be adopted, all coming within the scope of the claims which follow.

What is claimed is as follows;

1. Apparatus for forming an angular tubular terminal clip and for attaching the clip to a cable comprising in combination; punch and dielmembers for forming a series of connected blanks from a sheet of strip material; means for severing the foremost blank from the remainder of the strip; means for bending the severed blank into an angular member to provide a pair of arms and concurrently bend the arms into U shape; means for completing the bending of the arms into tubular form, one of the arm's being bent about the cable in order to attach the angular terminal clip to the cable.

2. Apparatus for forming an angular tubular terminal clip and for attaching the clip to a cable, comprising in combination; a plurality of punch and die members for forming from a strip of sheet metal-a series of connected blanks comprising wings on each side of an intermediate portion, said wing being adapted to provide arms for embracing a conducting element, said blank being connected by the wing portions; means for severing the wings of the foremost blank from the remainder of the strip; means for bending the severed blank into an L-shaped member and simultaneously bend the wings to provide arms of U-shaped formation; means for completing the bending of the wings to provide arms of tubular formation, one set of wings being bent around the cable in order to attach the terminal means for severing the blanks from the remain- I der oi the strip; means for bending the intermediate portion of the severed blank between the detent and the prong to provide an angular member and concurrently bending the ears to provide a pair of arms of U-cross section, one of the arms enclosing the detent and the other am enclosing the prong, said last mentioned arm being adapted to receive an end of the cable; and means for completing the bending oi. the ears of each arm into tubular form and causin the pointed prong to pierce the insulation and engage the conducting element of the cable.

4. Apparatus for forming an angular terminal ferrule and for attaching the ferrule to a cable, comprising in combination: means for forming from a strip of sheet metal connected blanks with each blank having an intermediate portion provided with wings at each corner; means for deforming the intermediate portion between one pair of wings to provide a detent;

'means for piercing the intermediate portion between the other pair of wings to provide a pointed' prongin longitudinal alignment with the detent; means for trimming the edges of the wings adjacent the detent to provide an irregular edge;

means for severing the blanks from the remainder of the strip; means for bending the severed blank along its longitudinal length into an angular member and concurrently bending the intermediate portion on each side of a medial line into a U member so that the innermost edges of the wings located on the same side of the medial line substantially abut each other with the angular U-shaped arm including the pointed prong adapted to receive the cable; means for bending the wings into tubular form and causing the pointed prong to pierce the insulation of the cable and engage theconducting element of the cable.

5. Apparatus for forming an angular tubular clip and for. attaching the clip to a cable, comprising in combination; means for forming from a strip of sheet metal connected blanks with each blank having an intermediate portion provided with a spaced detent and a spaced pointed portion in longitudinal alignment; means for deforming the strip to provide the detent means for punching the strip to provide the intermediate portion with wings at each corner; means for trimming the edge of the strip adjacent the detent to provide an irregular edge; means for piercing the intermediate portion of the blanks to provide the pointed portion; means for severing the blanks from the strip; means for bending the intermediate portion along a medial line into V-shape and deforming the. section form-- ing the medial line including the wings into U-v shape with the angular U-shape arms including the pointed portion adapted to receive a cable; means for bending the wings into tubular members and causing the pointed portion to pierce the insulation and engage the conducting element of the cable.

6. Apparatus for forming an L-shaped terminal ferrule and for attaching one arm of the ferrule to a; cable, comprising in combination; means for forming from a strip of sheet metal connected blanks with each'blank having an intermediate portion provided with a wing at each corner with adjacent edges of the wings on the same side of a longitudinal medial line being inclined toward each other; means for deforming the intermediate portion to provide a detent at one end of the blank; means for piercing the intermediate portion to provide a pointed prong at the other end of the blank; means for severing the blanks from the remainder of the strip; 

